diff --git a/calc/com/tenwa/reckon/help/InterestCalServiceImpl.java b/calc/com/tenwa/reckon/help/InterestCalServiceImpl.java
index f1a564d34..627db02c4 100644
--- a/calc/com/tenwa/reckon/help/InterestCalServiceImpl.java
+++ b/calc/com/tenwa/reckon/help/InterestCalServiceImpl.java
@@ -71,7 +71,7 @@ public class InterestCalServiceImpl {
 
 			} else {
 				// 利息
-				inte = new BigDecimal(corpus_overage).multiply(new BigDecimal(preRate)).setScale(2,BigDecimal.ROUND_HALF_UP).toString();// 剩余本金*利率
+				inte = new BigDecimal(corpus_overage).multiply(new BigDecimal(preRate)).setScale(20,BigDecimal.ROUND_HALF_UP).toString();// 剩余本金*利率
 				// 本金, 租金-利息
 				corpus = new BigDecimal(rent_list.get(i).toString()).subtract(new BigDecimal(inte)).toString();// 租金-利息
 			}
diff --git a/calc/com/tenwa/reckon/util/RentTools.java b/calc/com/tenwa/reckon/util/RentTools.java
index c1abe2fd1..6da6f6b05 100644
--- a/calc/com/tenwa/reckon/util/RentTools.java
+++ b/calc/com/tenwa/reckon/util/RentTools.java
@@ -59,8 +59,8 @@ public class RentTools {
 		BigDecimal numfu1_B = new BigDecimal("-1");
 		int Nper_i = Integer.valueOf(Nper).intValue();
 		try {
-			pmt_B = numfu1_B.multiply(Rate_B).multiply(Pv_B.multiply((num1_B.add(Rate_B)).pow(Nper_i)).add(Fv_B)).divide((num1_B.add(Rate_B.multiply(Type_B))).multiply((num1_B.add(Rate_B)).pow(Nper_i).subtract(num1_B)), 10, BigDecimal.ROUND_HALF_UP);
-			return pmt_B.toString().equals("") ? "0" : pmt_B.setScale(2, BigDecimal.ROUND_HALF_UP).toString();
+			pmt_B = numfu1_B.multiply(Rate_B).multiply(Pv_B.multiply((num1_B.add(Rate_B)).pow(Nper_i)).add(Fv_B)).divide((num1_B.add(Rate_B.multiply(Type_B))).multiply((num1_B.add(Rate_B)).pow(Nper_i).subtract(num1_B)), 20, BigDecimal.ROUND_HALF_UP);
+			return pmt_B.toString().equals("") ? "0" : pmt_B.toString();
 		} catch (Exception e) {
 			e.printStackTrace();
 		}