The invention relates to an indoor wall-buried wire non-destructive detection instrument which comprises a sensor module (1), a multistage amplifying circuit module (2), a singlechip module (3) and a display module (4), wherein the output terminal of the sensor module (1) is connected with the input terminal of the multistage amplifying circuit module (2), the output terminal of the multistage amplifying circuit module (2) is connected with the input terminal of the singlechip module (3), and the output terminal of the singlechip module (3) is connected with the display module (4). The indoor wall-buried wire non-destructive detection instrument adopts a non-destructive detection technology, does not destruct a wall surface, has low cost, high sensitivity, remarkable strength variance when closing to a live wire, accurate positioning, small error between an indicative position and a practical wire position in a range from -0.5cm to 0.5cm, easiness and simplicity, maneuverability without any professional knowledge, simple structure, firmness, durability, safety, reliability, no ray release, no ultrasonic wave release, and the like and does not need to mount an instrument on the wire, thereby being convenient and practical.