Spinning solution, preparation method of cotton composite yarn, cotton composite yarn and fabric

The invention relates to the technical field of spinning, and discloses a spinning solution, a preparation method of cotton composite yarn, the cotton composite yarn and fabric. Wherein the spinning solution comprises a polymer solution, and a coloring agent, a cross-linking agent and a photoinitiator which are dissolved in the polymer solution. Wherein the concentration of a polymer in the polymer solution is 5 wt% to 50 wt%; the mass ratio of the colorant to the polymer is 0.1 to 3. The preparation method of the cotton composite yarn comprises the step of carrying out electrostatic spinning on a spinning solution to obtain the colored micro-nano fibers. And the colored micro-nano fibers are embedded in the cotton web to form the cotton card slivers. And performing light treatment on the cotton card slivers. The cotton card slivers subjected to light treatment are made into the cotton composite yarn. The coloring agent can be stably fixed, the color fastness is improved, and colorful coloring can be realized