The invention discloses a signal conversing device of static multipoint strain gauge, which comprises the following parts: several detecting point conversing circuit, conversing controller and center controller, wherein the detecting point conversing circuit contains first input end A, second input end C, first output end B, second output end D, fifth relay K5, sixth relay K6, seventh relay k7, first fixing resistance R1, second fixing resistance R2, first switch-in point RX1, second switch-in point RX2, third switch-in point RX3, forth switch-in point RX4. The invention reduces error from 0.5 percent to 0.3 percent, which improves conversing speed obviously.