Soft rock roadway supporting device

The soft rock roadway supporting device is used for supporting a soft rock roadway and comprises a plurality of supporting supports, a plurality of left anchor rods and a plurality of right anchor rods, the multiple supporting supports are arranged in the length direction of the roadway at intervals, and each supporting support comprises a left stand column, a right stand column and a top arch frame; the two ends of the top arch frame are connected to the top ends of the left stand columns and the top ends of the right stand columns respectively, the number of the left anchor rods is equal to that of the left stand columns, the top ends of the left anchor rods are fixed to the bottom ends of the left stand columns in a one-to-one correspondence mode, the left anchor rods extend towards the lower left and are anchored into rock, and the number of the right anchor rods is equal to that of the right stand columns. The top ends of the right anchor rods are fixed to the bottom ends of the right stand columns in a