Portable length detection device with adjusting function

The utility model discloses a portable length detection device with an adjusting function, which comprises a hanging belt, a shell, a circuit board and a roller, the circuit board is mounted on one side, far away from a spring shaft, of the bottom in the shell, a control chip is mounted on one side of the circuit board, a networking module is mounted on one side of the control chip, and the roller is mounted on the other side of the networking module. A power source assembly is installed on one side of the top in the shell, a shell is installed in the power source assembly, a lithium battery is installed in the shell, a rolling wheel is installed on one side of the power source assembly, a rubber block is installed on the outer side of the rolling wheel, and a transmission wheel is installed on one side of the rolling wheel. According to the utility model, the roller is installed in the housing, the roller can be attached to the surface of a measured object, the roller is further rotated through the moving de