The present invention discloses a method for reporting a power headroom report and a user equipment, which are applied in the field of communications. The method includes: triggering reporting of a first power headroom report, and determining that a condition of sending the first power headroom report is satisfied, where the condition of sending the first power headroom report includes: determining that uplink data channel transmission occurs in a current transmission time interval; obtaining the first power headroom report, where the first power headroom report includes a first power headroom value, and the first power headroom value includes a difference between maximum transmitting power of a carrier and a sum of transmitting power of a control channel of the carrier and transmitting power of a data channel of the carrier; and sending the first power headroom report. The present invention solves the problem in the prior art that a base station has no correct power headroom for reference during resource scheduling.