The utility model discloses a quiet elastic modulus detection device of prismatic test block of concrete based on strike echo, include: the cutting structure is used for with the prismatic test blockcut growth of concrete carefully than more than or equal to 2's test piece, it is used for the test piece after the cutting along two terminal surfaces of length direction smoothness of polishing to polish the structure, the sensor contact of the multi -functional detection of concrete structure paint vaseline test piece detection test piece move elastic modulus. The utility model discloses that can swiftly, accurately detect the prismatic test block of concrete has real -time quiet elastic modulus promptly, avoids the test block static pressure test of bulk redundancy, easy operation, low cost can avoid purchaseing testing equipment such as large -scale compression testing machine, can effectively reduce engineering cost, the error that used formula can reduce to utilize indirect data toderive and bring.